Umbrella having a golfball motif



FIG. 1 is a perspective view of an umbrella having a golfball motif showing my new design;

FIG. 2 is a side view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom view thereof. 

The ornamental design for an umbrella having a golfball motif, as shown and described. 